ZVI/Cu双金属活化双氧水降解甲基橙

ZVI/Cu Bimetallic Activated Hydrogen Peroxide Degradation of Methyl Orange

以m(ZVI)∶m(Cu)=10∶1制备了ZVI/Cu(铁/铜)双金属颗粒,并以ZVI/Cu双金属作为催化剂活化双氧水(H2O2),通过产生的强氧化剂羟基自由基(·OH)降解偶氮染料甲基橙.通过对ZVI/Cu双金属进行表征,观察其表面形貌及微观结构.对比ZVI、Cu和ZVI/Cu双金属活化H2O2降解甲基橙的去除率随时间的变化,发现ZVI/Cu双金属具有较强的活化H2O2降解甲基橙的能力.研究了ZVI/Cu双金属颗粒的投加量、双氧水的浓度和pH值对甲基橙去除率的影响,并对试验参数进行了优化.结果表明,在甲基橙初始质量浓度为50 mg·L^-1、ZVI/Cu双金属投加量为3 g·L^-1、H2O2浓度为2.0 mmol·L^-1、pH值为4.0的条件下,反应进行60 min甲基橙去除率可达到80.1%.

ZVI/Cu(iron/copper)bimetallic particles were prepared by m(ZVI)∶m(Cu)=10∶1,and ZVI/Cu bimetal was used as catalyst to activate hydrogen peroxide(H2O2),and the strong oxidant hydroxyl radical(·OH)was produced to degrade azo dye methyl orange.The surface morphology and microstructure of ZVI/Cu bimetal were observed.By comparing the removal rate of ZVI,Cu and ZVI/Cu bimetal activation H2O2 degradation methyl orange with the change of time,it is found that ZVI/Cu bimetal has a strong activation capacity.The effects of different dosage of ZVI/Cu bimetal particles,different hydrogen peroxide concentration and different pH value on the removal rate of methyl orange were studied,and the experimental parameters were optimized.The results showed that under the conditions of initial methyl orange concentration of 50 mg·L^-1,ZVI/Cu bimetal dosage of 3 g·L^-1,H2O2 concentration of 2.0 mmol·L^-1 and pH value of 4.0,methyl orange removal rate of 60 min could reach 83.4%.